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ntoskrnl.exe and USBPORT.SYS causing high CPU usage
I just upgraded from Windows XP Pro to Windows 7 Pro x64 last week and I am already experiencing some issues. The most pressing is that I am experiencing stuttering after I have been using the computer for varying lengths of time. It can occur within a few minutes of first booting the computer or it can happen within hours. The time also varies depending on what I am doing, either normal internet use or gaming. I have updated all my chipset and hardware drivers and it was still occuring. So, I looked into it a bit more and found suggestions to run the xperf program to find my high CPU usage. It comes up with ntoskrnl.exe and USBPORT.SYS as causing the highest amount of usage. I also ran LatencyMon after seeing several suggestions for that program as well. It also comes up with ntoskrnl.exe as causing the highest amount of CPU usage. Aside from updating drivers, I have also tried reinstalling Windows a second time with no luck. Any way to fix this issue?